<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/driving_school_logo.jpg" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user" placeholder="请输入账号"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" placeholder="请输入密码"
                    show-password></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: "Login",
  data() {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: '',
        password: ''
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          {required: true, message: '请输入登录名称', trigger: 'blur'},
          {min: 3, max: 16, message: '长度在 3 到 16 个字符', trigger: 'blur'}
        ],
        // 验证密码是否合法
        password: [
          {required: true, message: '请输入登录密码', trigger: 'blur'},
          {min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur'}
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    // trans:function(user){
    //   let url = "";
    //   for (let k in user) {
    //     let value = user[k] !== undefined ? user[k] : "";
    //     url += `&${k}=${encodeURIComponent(value)}`;
    //   }
    //   return url ? url.substring(1):"";
    // },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        // security session 登录
        // let data = this.trans(this.loginForm);
        // const {data: res} = await this.$http.post('/user/login', data,{
        //   headers: {
        //     'Content-Type':'application/x-www-form-urlencoded'
        //   }
        // })

        this.$http.post('/user/login', this.loginForm).then(res => {
          if (res.data.code === 200){
            this.$message.success(res.data.message)
            window.sessionStorage.setItem('token', res.data.data.token)
            window.sessionStorage.setItem('user', res.data.data.user)
            this.$router.push('/home')
          }else {
            this.$message.error(res.data.message)
          }
        }).catch(err => {
          console.log(err)
          this.$message.error(err.message)
        })

        // const {data: res} = await this.$http.post('/user/login', this.loginForm)
        // if (res.code !== 200) return this.$message.error(res.message)
        // this.$message.success(res.message)
        // // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
        // //   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
        // //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        // window.sessionStorage.setItem('token', res.data.token)
        // // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        // this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>

